Conveyer.



0. H. GILLEY.

CONVEYBR. v.

APPLIOATION FILED s112113, 1911.

1,075,548., .Patented 001.14, 1913.-

WFL-www STATES? Farr sfr ortica;

OSBOBN H. CILLEY, F WESTFORD, MASSACHUSETTS, ASSIGNOB, T0 C. G. SARGENTSSONS CORPORATION, 0F GRANITEVILLE, MASSACHUSETTS, A CORPORATION 0FMASSACHUSETTS.

CONVEYEB.

Patented Oct. 14, 1913.

Application led September 13, 1911. Serial No. 649,136. v

To all lwhom it may concern Be it known that I, OsBoRN H. CILLEY, a

l citizen of the United Statel residing at Westford, in the county ofiddleseX and State of Massachusetts, have invented a new and usefulConveyer, of which the following is a specification. p

This invention is an improvement over that of Albert H. Thompson,patented March 21, 1911, No. 987,415. In using conveyers of the typerepresented in that patent I-ind that when square meshed wire cloth orperforated sheet metal is used certain diiiiculties arise. Ordinarily itis necessary to provide the drums 12 shown by Thompson for supportingthe apron when it passes around between the sprockets. If this is notdone it is necessary to elevate the apron above the pitch line of thechain so that when the chain moves over the sprocket the wire clot-h orsheet metal, which then becomes a chord of the circle, will remainperfectly straight. This, obviously, is a disadvantage as it requiresthe cross slats to be offset at their ends and necessitates somecalculation to bring them to the proper position. If the drum is usedwith thiskind of wire cloth or metal the tendency is for each section toretain` the curve of the drum, making the apron assume a series ofcurves.

The principal objects of this invention are to provide an exceedinglysimple means for avoiding these difficulties so that the apron can bearranged on the pitch line of the chain with straight cross bars and yetthere will be Ilo tendency for the sections to become curved by theoperation thereof; also to provide an improved way o-f stiifening theedges of the sections of the apron.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which- Figure 1is a sectional view on the line 1-1 of Fig. 2, showing oneof; thesprocket wheels of this invention in elevation; Fig. 2 is a plan onreduced scaleof a complete apron constructed in accordance with thisinvention. Fig; 3 is an enlarged transverse sectional view of a sectionof the apron itself somewhat diagrammatic in 'form showing the-stiifenededges, and Fig. 4 is a fragmentary view of a modification.

The invention is shown in a practicable form in which a pair of endlesschains 10 run over a pair of sprocket wheels 11. The two chains areconnected b cross slats 12 on a level with the 'apron an ixedly securedat opposite ends to links of the two chains. These cross slats are atuniform distance a art and between them are located sections 1 of wirecloth constituting the apron proper. These sections are shown as'secured in position on the slats in a manner substantially the same asthat shown in the Thompson patent hereinbefore referred, to.

The invention is applicable to perforated metal plates 13a as shown inFig. 4. It will be observed that the wire cloth sections are shown asprovided with inward bends at their edges 14, the wire extending alonginwardly a certain distance and then being bent outwardly again to formanother layer 15. This third layer may be between the other two lafyers,as shown at the left. This forms a sti edge and prevents undue wear atthis point and does away with the ordinary binding of the edge with apiece of canvas or metal, as has, been practiced heretofore. Theprincipal feature of the invention, however, consists in the provisionof a polygonally constructed wheel 11 having a number of equal sides andarranging the apron on the pitch line of the chain 10. It will beobvious that with this polygonal wheel the apronsections between thecross V slats 12 would hang down as the apron sections pass over thesprocket wheels, if it Were not for the fact that the cross slats arearranged at a distance apart equal to the length of a side of thesprocket wheel, and the chains are put on the sprocket wheels in suchposition that these s latscome at the angular portions between each twostraightsides. From this it results that the apron sections between eachtwo slats, as it passes over the sprocket wheel, is kept straight andtaut and there is no tendency for the sections to sag or bind. In otherwords, the apronsections are kept in uniform condition all the time andthe disadvantages which have been mentioned are entirely overcome.

Although I have illustrated and described a preferred embodiment of theinvention, I am aware that many modifications can be made therein by anyperson skilled in the art without departing from the scope of theinvention as expressed in the claim. Therefore I do not wish to belimited to all the details of construction herein shown and described,but

What I do claim is In a conveyer, the combination of polygonal sprocketshaving equally spaced teeth along their fiat sides and one tooth at eachangle, a pair of sprocket chains located thereon at the pitch linesthereof and engaging said teeth, cross slats connecting said chains thedistance between two slats being equivalent to the length of one side ofeach sprocket and to the sum of the lengths of a lurality of links ofthe chain, the chains eing located so that the slats will come at theangles ojf the sprockets, and a continuous endless metallic apronconnected directly to all of the slats on both sides thereof on .he

pitch lines of the sprockets, whereby "the,`

witnesses.

OSBORN H. CILLEY. Witnesses:

FRANK Comms, FRED W.. SwArN.

